| HS Code | 503824 |
| Vinyl Acetate Content | 18% |
| Density | 0.94 g/cm³ |
| Melt Flow Rate | 20 g/10 min (190°C, 2.16 kg) |
| Tensile Strength At Break | 12 MPa |
| Elongation At Break | 800% |
| Flexural Modulus | 55 MPa |
| Shore A Hardness | 90 |
| Vicat Softening Temperature | 61°C |
| Melting Peak Temperature | 84°C |
| Brittleness Temperature | -80°C |
As an accredited Microthene MU76300 Ethylene Vinyl Acetate Copolymer (LyondellBasell) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Available in 25 kg bags, Microthene MU76300 ethylene vinyl acetate copolymer is supplied as free-flowing pellets for processing. |
| Container Loading (20′ FCL) | 20′ FCL: Microthene MU76300 EVA copolymer loaded as full container load, securely packed in bags on pallets, ready for transport. |
| Shipping | Microthene MU76300 (Ethylene Vinyl Acetate Copolymer) ships as a non-hazardous plastic powder. Use dry, sealed containers to prevent moisture and dust release. Avoid elevated temperatures, open flames, and static ignition sources. Store in a cool, well-ventilated area. Not regulated as dangerous goods under IMO/ADR/IATA transport regulations. |
| Storage | Store Microthene MU76300 EVA copolymer in a cool, dry, well-ventilated area, away from direct sunlight, heat, sparks, and oxidizing agents. Keep containers tightly sealed to prevent moisture absorption and dust accumulation. Avoid static discharge and uncontrolled dust clouds. Maintain moderate humidity to prevent caking. Follow LyondellBasell guidelines and local regulations for safe handling and storage. |
| Shelf Life | Shelf life is indefinite when stored in a cool, dry place away from direct sunlight, heat, and moisture. |
Compounding lines producing high-tack packaging adhesives dry-blend Microthene MU76300 from its powder state to shorten low-shear wetting time and to avoid a pellet pre-melt stage that can induce localized vinyl acetate degradation. The vinyl acetate comonomer mass fraction of approximately 30–35 wt% suppresses crystallinity, permitting melt-viscosity reduction without external liquid plasticizers and widening the adhesion window on coated board, polyethylene terephthalate film, and aluminum-metallized surfaces. In a co-rotating twin-screw extruder with L/D 40:1 and a vacuum vent at zone 7, a case-sealing hot-melt formulation consists of 25–35 wt% Microthene MU76300, 35–45 wt% hydrogenated hydrocarbon tackifier, 15–25 wt% paraffin wax, and 0.3–0.5 phr hindered phenolic antioxidant. Barrel temperatures are set from 120°C at the feed throat to 150°C at the die; screw speed is maintained at 250–350 min⁻¹ and die pressure below 45 bar. The resulting slat or pillow pellets are applied with gear-pump melting units and slot-die coaters at 160–180°C; hot-melt viscosity is checked under ASTM D3236 with a Brookfield thermosel at 180°C. Food-contact adhesive uses must comply with 21 CFR 175.105, and REACH SVHC documentation is verified through the supplier safety data sheet. Finished product types include high-speed corrugated case sealing, bookbinding spine adhesives, and removable label assembly lines. The process boundary is defined by ester thermolysis: residence time above 180°C should not exceed 30 min, because evolved acetic acid can corrode die lips, form carbon deposits on application nozzles, and reduce peel adhesion on metallized films.
Solvent-borne adhesive manufacturers use the powder form of Microthene MU76300 to eliminate pellet pre-soaking and to reduce the time required to reach clear, lump-free solutions. A typical gravure lamination adhesive is prepared at 15–18 wt% final solids in a 70:30 ethyl acetate/toluene blend, with the dried adhesive composed of 60–70 wt% EVA binder and 30–40 wt% rosin ester or hydrogenated hydrocarbon tackifier. Dissolution is conducted in a closed high-shear dissolver at 40–60°C for 2–4 h; nitrogen blanketing is recommended because the high-VA grade can absorb moisture from humid air and produce a hazy solution under open vessels. The coating line uses a gravure roll or reverse roll coater with drying tunnel temperatures of 80–100°C and a lamination nip held at 70–90°C; coat weights are controlled between 1.5 g/m² and 3.5 g/m² dry. Solution viscosity is monitored by ASTM D2196, and pot-life drift is recorded at 25°C. Compliance for retortable flexible packaging applications must align with 21 CFR 175.105 for adhesives and, where the bond layer is functionally a coating, 21 CFR 175.300. Terminal finished product types include retortable pouch laminates, foil-to-film heat-seal coatings, and printed snack package laminations. The upper solids limit is set by viscosity stability: above 18 wt%, the high vinyl acetate content can generate normal force fluctuations in enclosed doctor chambers, and the dissolved polymer may phase-separate when aromatic content in the solvent blend drops below 25 wt%.
Polymer-modified bitumen waterproofing membranes incorporate EVA as a softening-point modifier and low-temperature flexibility agent, with the powder grade dissolving faster than pelletized EVA in oxidised bitumen. The addition ratio is typically 4–8 wt% EVA powder relative to the bitumen charge, fed after the bitumen reaches 170°C into a vertical high-shear mixer running at 1,400–2,000 min⁻¹. Digestion is held at 170–190°C for 2–4 h; endpoint control is taken from the mixer current-draw plateau rather than a fixed residence time. Softening point is measured by ASTM D36, penetration at 25°C by ASTM D5, and low-temperature flexibility of the finished sheet by EN 1109. The modified bitumen is coated onto polyester or glass-fibre carriers through a calendar or extrusion coating line and then surfaced with sand, talc, or film. Regulatory compliance is structured around EN 13707 for flexible sheets for waterproofing and EN 13969 for built-up roofing. Finished product types include torch-applied basement roofing membranes, self-adhesive underlayments, and bridge deck waterproofing sheets. Operation above 200°C should be avoided because EVA degradation raises gel content and causes a sudden drop in coating viscosity, leading to inconsistent carrier penetration and poor seam adhesion after heat ageing.
Carpet and automotive tufted floor-covering backcoating uses a high-filler EVA compound to lock nylon or polyester pile yarns to the primary backing while providing dimensional stability and edge sealing. In a continuous extrusion-coating calender line, a representative pre-coat formulation uses 22–28 wt% Microthene MU76300, 50–60 wt% calcium carbonate with a median particle size of 5–10 µm, 8–12 wt% aliphatic hydrocarbon tackifier, and 1–2 wt% stearate processing aid. The compound is extruded through a slot die onto the back of the primary scrim at 130–160°C and immediately nipped by a chilled calender; coat weight is maintained between 250 g/m² and 700 g/m² depending on pile density and the tufted product’s abrasion class. The powder feed format shortens low-shear dispersion time compared with pelletized EVA, but hopper temperature must remain below 40°C to prevent tacky agglomerate formation. Compliance for automotive floor coverings is verified through VDA 278 for VOC and FOG emissions and EN 1307 for textile floor coverings. Terminal finished product types include cut-pile automotive floor mats, commercial broadloom carpet tiles, and entrance mat backings. The addition ratio should be reduced toward 18 wt% when secondary-backing lamination requires a harder surface, and increased toward 30 wt% only if the carpet tile requires higher tuft retention after high-humidity ageing.
Flexible PVC formulation can partially replace phthalate or DINCH liquid plasticizers with a powdered EVA modifier to reduce plasticizer migration and to raise scuff resistance without changing the base polymer. The dry blend is prepared in a hot/cool ribbon mixer at 80–110°C with 100 phr PVC resin, stabilizer, filler, liquid plasticizer, and 5–15 phr Microthene MU76300 powder; the powder is added after the liquid plasticizer has been absorbed to avoid coating the PVC primary particles and delaying fusion. The dry blend is extruded on a counter-rotating twin-screw extruder with barrel temperatures of 160–180°C and a die temperature of 175–185°C. Tensile performance is evaluated according to ISO 527-2, low-temperature impact according to ISO 180, and hardness changes are monitored under ISO 868. Regulatory compliance for general industrial applications follows REACH, and food-contact uses must meet EU 10/2011 migration limits for the complete formulation. Terminal products include garden hose jackets, footwear sole compounds, cable jackets, and automotive profiles. Above 15 phr the melt viscosity and fusion time increase sharply, and the extrudate tends to develop low-gloss surface roughness, so the upper limit is set by line torque and surface-quality acceptance criteria.
Masterbatch producers select a powdered EVA carrier when the active pigment or functional additive is heat-sensitive and when a pellet carrier would require excessive shear heating for complete dispersion. A color masterbatch for polyolefin film can be compounded with 35–45 wt% Microthene MU76300 carrier, 50–60 wt% organic pigment, and 1–3 wt% polyethylene wax dispersant in a co-rotating twin-screw extruder with L/D 36:1; barrel temperatures are set from 100°C to 130°C, and melt pressure at the die is held below 35 bar. When the pigment oil absorption exceeds 60 g/100 g, carrier loading should be raised toward 45 wt% to maintain particle wetting, but this can reduce strand hardness and require lower water-bath temperature. The strand is cooled and pelletized; the carrier is later let down at 2–5 phr in the host polyolefin. Because the EVA carrier melts before the host resin, pigment begins to transfer from the carrier phase before the polyolefin reaches full melt, but carrier addition above 5 wt% of the final article can reduce thin-film clarity and weaken heat-seal strength. Compliance for polymer colorants is anchored to 21 CFR 178.3290, and the final article must satisfy applicable food-contact migration limits if used in packaging. Terminal finished product types include colored packaging films, injection-molded caps, and extrusion-coated paperboard. Pre-drying at 60°C for 2 h is recommended when bags have been opened under high humidity, because moisture can cause bubble defects during strand extrusion and uneven pigment wetting.
Textile interlining fusing lines use EVA powder as the primary binder in the dry dot-coat process for shirt collars, cuffs, and waistbands. The powder is scattered onto a nonwoven or woven interlining substrate at a coat weight of 8–20 g/m², then fused to the outer fabric in a continuous infrared or hot-air tunnel at 130–160°C with nip pressure 1.5–3.0 bar. In blended powder systems, the EVA grade is combined with low-density polyethylene or co-polyamide powders at 60–100 wt% EVA content to lower the fusing temperature and to improve adhesion to difficult fabrics. Fusing bond strength is checked after laundering according to the garment manufacturer’s internal durability protocol; chemical safety conformance is documented under OEKO-TEX Standard 100 and REACH. Terminal finished product types include fusible interlinings for formal shirts, blouses, and light jackets. The process is limited at the upper end by the fusing cycle: exposure above 170°C can cause strike-through of the molten powder into the face fabric, while insufficient dwell below 120°C produces weak peel bonds after repeated laundry cycles.
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Microthene MU76300 is a micronized ethylene-vinyl acetate copolymer powder supplied by LyondellBasell under the Microthene product family. The grade is distinguished from pelletized EVA resins by its combination of a high melt flow rate, nominal vinyl acetate incorporation near 19 wt%, and a fine particulate form that permits dry blending, powder scattering, and low-shear melt dispersion. The product is used where rapid melt flow, substrate wetting, low-temperature flexibility, and elimination of a pellet pre-melt step are process-critical, notably in hot-melt adhesives, textile lamination binders, powder coatings, and specialized polymer modification. The CAS registry number for ethylene-vinyl acetate copolymer is 24937-78-8. Published data for this specific product configuration are limited to the manufacturer certificate of analysis and formulary-specific studies; therefore, nominal values should be verified for each lot before production use.
On the manufacturer certificate of analysis, the material is characterized by a melt flow rate of 300 g/10 min measured under ISO 1133-1:2022 conditions at 190 °C and 2.16 kg. This places MU76300 in the high-flow segment of EVA copolymers, substantially above conventional EVA film and extrusion grades that typically range from 2 g/10 min to 20 g/10 min. The nominal density is 0.94 g/cm³ under ISO 1183-1:2019, consistent with a vinyl acetate content near 19 wt%. The differential scanning calorimetry melting range is typically 80–85 °C under ASTM D3418-21, with a crystallization onset sufficiently low to support heat-activated bonding and short open times. The powder is typically specified with a particle-size distribution in which more than 90% of the material passes a 75 µm sieve, although the current certificate of analysis governs exact values. Because lot-to-lot variation applies, the nominal figures above should not be substituted for release testing.
In hot-melt adhesive processing, the melt flow rate of 300 g/10 min is the controlling rheological parameter. At application temperatures between 140 °C and 170 °C in heated reservoir, drum unloader, or tank melter equipment, the polymer forms a low-viscosity melt that penetrates porous substrates such as corrugated board, nonwoven fabric, and medium-density fiberboard. Open time is governed by the delay between melt application and recrystallization onto the substrate. The DSC melting range of 80–85 °C and a crystallization onset near 65–70 °C result in a short-to-moderate open time. Formulators extend open time by adding tackifiers, microcrystalline waxes, or higher-VA copolymers rather than by raising the application temperature. Excessive melt temperature above 190 °C, or prolonged residence in the hot-melt reservoir, accelerates de-acetylation of the vinyl acetate groups, leading to acetic acid release, viscosity drift, corrosion of uncoated steel surfaces, and loss of adhesion. Published equipment-specific data for MU76300 in continuous hot-melt lines are limited; however, typical application equipment includes hot-melt slot-die coaters, spiral bead applicators, gravure roll coaters, and platen-type drum unloaders operating within the temperature bounds stated above.
In formulated hot-melt systems, MU76300 is combined with hydrocarbon tackifiers, paraffinic waxes, and hindered phenolic antioxidants in paddle, sigma-blade, or vertical intensive mixers. The powder form permits metering by gravimetric screw feeders directly into the melt without the pre-melt stage required for pelletized EVA. Shear adhesion failure temperature may be assessed by ASTM D4498-20, and T-peel adhesion of laminated assemblies by ASTM D1876-23. For EVA hot-melt systems of this type, practical service temperatures are ordinarily in the −10 °C to 50 °C range unless the formulation is specifically modified with plasticizers or elastomeric additives. Low-temperature flexibility is associated with the nominal 19 wt% vinyl acetate content; brittle point can be evaluated by ASTM D746-20, but published lot-specific data for this product in a fully formulated hot-melt are limited.
Unlike pelletized EVA grades that require melt compounding or intense shear to achieve uniform dispersion, MU76300 can be distributed in low-shear planetary mixers, ribbon blenders, and high-speed powder mixers. In plastisol, solvent-borne coating, and dry-blend operations, the powder is introduced directly into pigment pastes or filler packages without prior pellet grinding. This reduces the thermal history of the polymer and avoids the molecular weight loss and color development that can occur during repeated melting of high-flow EVA. The operational penalty is dusting and electrostatic segregation. Fine polymer powders of this particle-size range should be handled with adequate ventilation and with combustible-dust controls aligned to NFPA 654 or equivalent regional standards. The powder is not intended for blown film, blow molding, or other operations requiring high melt strength; its high melt flow index produces low melt tension and poor bubble stability. In those applications, pelletized EVA extrusion grades with melt flow rates below 20 g/10 min are preferred.
Compared with low-VA EVA grades below 12 wt% vinyl acetate, MU76300 provides improved adhesion to polar substrates and greater low-temperature flexibility. Compared with high-VA grades above 25 wt% vinyl acetate, the 19 wt% nominal level retains higher crystallinity, lower surface tack, and better resistance to cold flow at ambient storage temperatures. Compared with maleic anhydride-grafted or acid-functional adhesion promoters, MU76300 relies on the polar vinyl acetate comonomer rather than carboxylic acid groups; this avoids acid-catalyzed interactions with pH-sensitive additives and reduces corrosion risk in processing equipment. Among LyondellBasell Microthene powders, the MU76300 designation identifies a high-flow EVA powder rather than a low-density polyethylene or linear low-density polyethylene powder; the product should not be substituted directly into applications formulated for nonpolar polyolefin powders without re-evaluating adhesion, melting range, and regulatory status.
The following comparative table summarizes the principal differentiation of MU76300 against a conventional pelletized EVA extrusion grade of similar vinyl acetate content.
| Characteristic | Microthene MU76300 | Conventional EVA pellet grade |
|---|---|---|
| Melt flow rate | 300 g/10 min under ISO 1133-1:2022 at 190 °C/2.16 kg | 2–20 g/10 min under same conditions |
| Vinyl acetate content | 19 wt% nominal | 18–20 wt% nominal |
| Physical form | Powder, more than 90% finer than 75 µm | Pellets |
| Density | 0.94 g/cm³ under ISO 1183-1:2019 | 0.93–0.95 g/cm³ |
| Melting range | 80–85 °C under ASTM D3418-21 | 84–90 °C |
| Primary processing route | Dry blending, hot-melt, powder coating | Melt extrusion, blown film, injection molding |
| Melt strength | Low, unsuitable for blown film | Moderate to high |
In textile lamination and transfer-coating operations, MU76300 is used as a heat-activated binder powder or as a modifier in polyamide and polyester hot-melt systems. The powder can be scattered onto fabric by a distributing roll or applied by engraved roller powder dot coating. Under lamination presses operating at 90–120 °C and 0.2–0.5 MPa, the powder fuses and forms a continuous bond line. Wash resistance of the resulting laminate can be evaluated by ISO 6330:2021; however, published lot-specific data for MU76300 in textile laminates is limited because final performance depends on fabric finish, coating weight, and topcoat chemistry. The melt temperature of the lamination press should be kept below 190 °C, and residence time at temperature should be minimized to prevent yellowing and acetic acid formation. In powder dot coating machines, engraved roller temperatures are commonly maintained below the DSC melting range to prevent premature fusion in the hopper and on the doctor blade.
For masterbatch and carrier applications, MU76300 can serve as a high-flow carrier resin for heat-sensitive additives. On a corotating twin-screw extruder with a 40:1 length-to-diameter ratio, side-feeding of powder at 20–30 wt% additive loading permits melt temperatures to be maintained below 180 °C. Residence time is typically held under 90 s to limit thermal degradation of the vinyl acetate units. The powder form eliminates the need for cryogenic grinding of a low-MFR carrier and reduces specific mechanical energy input during dispersion of pigments, fire retardants, or nucleating agents. If the extruder is vented, the vacuum port should be monitored for acetic acid evolution; published long-run equipment data for this specific product are limited but general EVA processing practice recommends maintaining vent vacuum below −0.08 MPa gauge and avoiding open atmospheric vents at melt temperatures above 190 °C.
Regulatory compliance for MU76300 is formulation-dependent and must be verified for the final article. In the United States, ethylene-vinyl acetate copolymers may be considered for food-contact articles under 21 CFR 177.1350, and for food-contact adhesives under 21 CFR 175.105, provided that monomer residues, overall migration limits, and end-use restrictions are satisfied by the finished formulation. For the European Union, REACH registration for the polymer and any intentionally added substances must be confirmed through the supply chain. In electrical and electronic applications, the finished article must meet the substance restrictions of RoHS Directive 2011/65/EU. The powder is not a hazardous substance under normal handling conditions, but fine organic powders can form combustible dust clouds; local dust-control and static-grounding requirements apply. Published data for this specific product in food-contact or electrical applications are limited, and no absolute compliance claim is made for the base resin alone.
Moisture uptake of EVA powder is low but not zero. Storage above 60% relative humidity may require pre-drying at 60–70 °C for 2–4 h before melt processing to prevent surface defects, bubbles, and viscosity irregularities. The powder may become tacky if stored above 40 °C due to surface sintering of the low-melting particles. If anti-caking is required, fumed silica at 0.1–0.3 wt% can be added by dry blending, but its addition may alter rheology and should be validated by melt flow and adhesion testing. For outdoor or ultraviolet-exposed applications, the base polymer has limited UV stability and requires addition of hindered phenolic antioxidants such as pentaerythritol tetrakis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate) at 0.1–0.3 wt%. Accelerated weathering can be assessed by ISO 4892-2:2023, but published test data for this specific polymer without a stabilizer package are limited.
In rotomolding and slush molding operations, the fine particle-size distribution of MU76300 can improve coating uniformity when the powder is applied as a surface modifier or adhesive interlayer between a polyolefin substrate and a subsequent decorative or protective coating. The powder melts at temperatures below typical polyolefin processing temperatures, allowing it to form a continuous film without requiring the substrate to reach full melt temperature. However, the high melt flow index and low melt strength make the product unsuitable as a structural rotomolding base resin. Equipment trials using a three-axis rotational molding machine at mold internal air temperature of 120–150 °C have shown that the powder can fuse onto polyethylene surfaces, but published peel-strength data for this specific configuration is limited. The process should include venting to remove any acetic acid generated at the upper end of the temperature range.
When MU76300 is used in solvent-borne or waterborne coating formulations, it is typically introduced as a dispersed powder rather than as a primary film-forming resin. The powder increases adhesion to nonpolar substrates and improves resistance to cold cracking in coatings applied to flexible packaging films and foils. In coatings, particle size and distribution shift with shear and solvent polarity; the powder may swell in aromatic or ketone solvents. Formulators should pre-test thickening, settling, and redispersion behavior in the final solvent system. Film formation occurs when the coating is dried and heated above 85 °C; below this temperature the powder may remain as discrete particles and fail to form a continuous film. The use of standard drawdown and cross-cut adhesion tests under ISO 2409:2020 is appropriate for quality control, but final values are formulation-dependent and should not be attributed to the base powder alone.
Continuous hot-melt mixing installations using gear pumps, static mixers, or plate-and-frame filtration should account for the low melt viscosity of MU76300. Leakage through gear pump clearances can increase at melt temperatures above 170 °C. Filtration mesh sizes below 100 µm may generate excessive backpressure if the powder contains agglomerates or if filler particles are present. In production-scale trials, batch-to-batch variance in particle size and bulk density can affect gravimetric feeding accuracy; feeders equipped with loss-in-weight control and mechanical agitation are preferred. Feed hoppers should be grounded and inerted if the powder concentration in air approaches the lower explosive limit. Published data for this product in continuous hot-melt mixing equipment is limited, but operational stability is improved by maintaining melt temperature below 180 °C and avoiding dead zones in piping where stagnant melt can degrade and periodically release acetic acid into the melt stream.
The high melt flow rate of MU76300 also restricts its use in injection molding and extrusion where melt residence time and melt pressure must be controlled. If the product is used as an additive or carrier resin in injection molded compounds, the screw should be designed for low compression and gentle mixing, and the hot runner system should avoid large stagnant melt volumes. Mold temperatures below 30 °C can cause rapid solidification and surface skin formation; mold temperatures between 30 °C and 50 °C may improve surface quality in thick sections. These values are general processing bounds for high-flow EVA powders and should be optimized with tool-specific trials.
